How can I do a 3d animation where inbetween frames are jumping to one value to another without easing in?
Many different ways:
If you want no interpolation between two keyframe you can set the interpolation mode to "constant" in the user preferences panel. 

You can also do it after the programming: open the graph editor, select all keyframes and press T and choose constant interpolation mode.

Another way is to use the dopesheet (expecially useful if you want some keyframes to "jump" and others to have a linear or bezier ease interpolation): select the first keyframe of the "jump" section and copy it near the last keyframe (one or two frames before). 

The video you posted seems to be not completely "jumping": it uses short interpolations but not constant at all. The constant mode is also very useful during the Blocking phase of the animation, for preparing the "animatic" version of the movie.